Journal
DESIGNED MONOMERS AND POLYMERS
Volume 19, Issue 1, Pages 12-23Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15685551.2015.1092008
Keywords
Urethane glyco-methacrylates; UV photopolymerization; -d-glucofuranose; -d-galactopyranose; d-mannitol
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Funding
- European Social Fond, Sectorial Operational Programme - Human Resources Development [POSDRU/159/1.5/S/137750]
- CNCSIS-UEFISCDI [PN-II-PT-PCCA-2011-3.1-1422 (146/2012)]
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Three methacrylated glycomonomers (CMA-1-3) were synthesized, characterized, and photocrosslinked in hydrophilic conetworks. The UV photobehavior of monomers was evaluated through FTIR spectrometry using Irgacure 819/Irgacure 2959 as photoinitiator, and the results showed that Irgacure 2959 is a better photoinitiator, the conversion degree (DC) varying in the range of 69-89.2% and the maximum rate of polymerization (R-p(max)) being similar to 10 s(-1). The addition of poly(ethylene glycol) dimethacrylate (PEG-DMA) or benzophenone macromer (BP-UDMA) as co-monomer improved the R-p(max) and DC (up to 100% after 300 s of irradiation in the latter). Specific analysis (gel fraction, water uptake, morphology) of the photopolymerized networks A1-A3 (CMA-1-3/PEG-DMA) and B1-B3 (CMA-1-3/BP-UDMA) demonstrated that B1-B3 films have interconnected inner pores, with irregular shapes and different sizes. The grid structures created through the two-photon polymerization of B1-B3 formulations in the presence of Irg819 are clearer and have a controlled porosity, of relevance for promising bioapplications.
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